| Gadfly Communications Limited | Professional & scientific | 2024 |
| Gafflow Resin Systems Ltd | Wholesale & retail | 2024 |
| Gagasoft Ltd | Information & communication | 2013 |
| Gaia Bar Ltd | Hospitality | 2024 |
| Galdur Technology Limited | Information & communication | 2025 |
| Galega Limited | Construction | 2018 |
| Galileo Satchi Limited | Health & social care | 2022 |
| Galloway Drive RTM Company Limited | Households | 2024 |
| Galloways Accounting (Eastbourne) Limited | Professional & scientific | 1985 |
| Galup Limited | Other services | 1994 |
| Gamar Medical Consultancy Ltd | Health & social care | 2023 |
| Game on Mobile Gaming Ltd | Arts & recreation | 2024 |
| Gamma Property Fund NO.1 LP | | 2006 |
| Ganai Medical Limited | Health & social care | 2019 |
| Ganda Media Limited | Wholesale & retail | 2007 |
| Ganesh UK Limited | Wholesale & retail | 2008 |
| Ganesha Upchurch Limited | Financial services | 2019 |
| Gannet House (Eastbourne) Limited | Households | 1987 |
| Ganti Limited | Professional & scientific | 2016 |
| Gapstows Law Ltd | Professional & scientific | 2024 |
| Gapstows Limited | Professional & scientific | 2012 |
| Garden & Estate Services Ltd | Administrative & support | 2008 |
| Garden Mews Management (Eastbourne) Company Ltd. | Households | 2001 |
| Gardenside Residents Company Limited | Households | 1996 |
| Gardners Books Limited | Wholesale & retail | 1986 |
| Garstons Limited | Real estate | 2001 |
| Gary Cunningham Limited | Construction | 2007 |
| Gary Dean Enterprises Ltd | Administrative & support | 2016 |
| Gary John Senior Ltd | Administrative & support | 2019 |
| Gary Walsh Fire and Management Consultant Limited | Professional & scientific | 2017 |
| Gastrodoctor (UK) Limited | Health & social care | 2016 |
| Gastroenterology Desk Ltd | Health & social care | 2025 |
| Gate Safe Automation Ltd | Administrative & support | 2016 |
| Gateheath Associates Limited | Financial services | 2014 |
| Gates & Bradshaw (UK) Limited | Real estate | 2002 |
| Gather Collective Ltd | Other services | 2010 |
| Gatwick Transport Solutions Ltd | Transport & logistics | 2020 |
| Gauntlett Property Investments Ltd | Real estate | 2018 |
| Gawaine Property Limited | Real estate | 2021 |
| Gazza Events Limited | Hospitality | 2021 |
| GB Automatics Ltd | Arts & recreation | 2016 |
| GB Energy Group Ltd | Construction | 2023 |
| GB Facilities Services Limited | Administrative & support | 2021 |
| GB Gorfel Ltd | Health & social care | 2023 |
| GB Recovery Limited | Wholesale & retail | 2017 |
| GB Roadside Repairs Ltd | Wholesale & retail | 2026 |
| GC Marine Ltd | Professional & scientific | 2022 |
| GCM Sales Consulting Ltd | Wholesale & retail | 2018 |
| Gconsulting&Services Ltd | Professional & scientific | 2025 |
| GDC Enterprises Ltd | Professional & scientific | 2024 |
| Gearing Media Group Limited | Information & communication | 1984 |
| Gecko Construction Limited | Construction | 2011 |
| GEH Management Solutions Limited | Professional & scientific | 2015 |
| Gelato Famoso Limited | Hospitality | 2003 |
| Gelin Property Limited | Administrative & support | 2010 |
| Gellatly Limited | Construction | 2017 |
| Gemcat Limited | Professional & scientific | 2018 |
| Gemini Cleaning (South East) Limited | Administrative & support | 2011 |
| Gemini Drawings Limited | Professional & scientific | 2014 |
| Genderless Ltd | Wholesale & retail | 2023 |
| General Noise Ltd | Professional & scientific | 2021 |
| General Rotors Limited | Manufacturing | 2022 |
| Genius Cleaning Franchise Ltd | Other services | 2014 |
| Genius Cleaning Solutions Limited | Households | 2017 |
| Genius Clothing Ltd | Wholesale & retail | 2024 |
| GEO Soils Limited | Construction | 2018 |
| Geoground Engineering Limited | Professional & scientific | 2020 |
| George and Dragon 1985 Limited | Hospitality | 2026 |
| George Stanley Mews (Management) Limited | Households | 2007 |
| George's RK Ltd | Transport & logistics | 2020 |
| GET Locky Ltd | Manufacturing | 2025 |
| GET Velp Limited | Information & communication | 2024 |
| Getdem Limited | Wholesale & retail | 2023 |
| GFS Investments Limited | Real estate | 2015 |
| GFY London Limited | Real estate | 2010 |
| Ggds Property Limited | Real estate | 2024 |
| GH Taxi Ltd | Transport & logistics | 2023 |
| Ghazen Ltd | Health & social care | 2021 |
| Gheego Limited | Hospitality | 2025 |
| Gibbs Engineering SA Limited | Manufacturing | 2025 |
| Gibson Entertainment Ltd | Hospitality | 2023 |
| GIBSON23 Ltd | Financial services | 2024 |
| Gica Limited | Health & social care | 2015 |
| Giffard Race Team Ltd | Arts & recreation | 2023 |
| Gifting Studio Ltd | Administrative & support | 2005 |
| Gildredge House Free School | Education | 2013 |
| Gill Autos & MOT Centre Limited | Wholesale & retail | 2000 |
| Gillshaw Pottery Limited | Manufacturing | 2021 |
| Ginger & Sanders Property Rentals Limited | Real estate | 2012 |
| Gingerbread Eastbourne Limited | Hospitality | 2025 |
| Gingham Hearts Events Ltd | Professional & scientific | 2025 |
| GJB Construction Services Limited | Construction | 2018 |
| GJB Operations Ltd | Wholesale & retail | 2021 |
| GK Property Developments East Sussex Ltd | Construction | 2024 |
| GK Smile Limited | Health & social care | 2017 |
| GK Tree Surgeons Ltd | Administrative & support | 2015 |
| GKB Triangle Ltd | Hospitality | 2002 |
| GKE Homes Limited | Real estate | 2023 |
| GKJ Holdings Ltd | Financial services | 2025 |
| GL Construction Projects Ltd | Construction | 2024 |